Delayed photon search at CDF

Most searches for new heavy particles at the Tevatron use the assumption that their decay 
occurs at the collision point. With the recent upgrade of the CDF detector to record the time 
of the arrival of electromagnetic particles, we now have the capability to look for heavy, 
long-lived exotic particles that decay to photons as would be the case in Supersymmetric 
neutralinos in a Gauge-Mediated models. In this talk we describe the potentially new signatures 
available for study and present first results from CDF on a search for delayed photons.